Short-circuiting device for magneto-electric igniting apparatus for explosion-motors.



G. HONOLD. SHORT GIRGUITING DEVICE FOR MAGNETO ELECTRIC IGNITING APPARATUS FOR EXPLOSION MOTOBS 7 APPLICATION FILED AUG.7, 1906.

993,375. Patented May 30,, 1911.

2 SHEETS-SHEET 1.

I NVIENXTU a 7% ATTORNEYS WITNESSES m. fivuflizw' G. HONOLD. 1 SHORT GIRGUITING DEVICE FOR MAGNETO ELECTRIC IGNITING APPARATUS FOR EXPLOSION MOTORS.

APPLICATION FILED AUG. 7. 1906.

patented May 30,1911.

INVENTDR WiTN ESSES iiinirno STATES PATENT OFFICE.

GOTTLOB HONOLD, STUTTGART, GERMANY.

SHORT-CIRCUITING bEVI GE FOR MAGNETO-ELECTRIC JGNITING APPARATUS FOR EXPLOSION-MOTORS.

Speeifieation of Iettersiatent. Patented 1\[ay 30, 1911, -Application filed August 7, 1906. Serial No. 329,569.

To all whom it may concern:

Be .it known that I, Go'rrnon HoNoLo, engineer, a subject of the German Emperor, residing at '11 Hoppenlaustrasse, Stuttgart,

Germany, have invented certain newanduseful Improvements in Short-Circuiting Devices for Magneto-Electric Igniting Apparatus for lilxplosion-h/Iotors; and I do hereby declare the following to be a full, clear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains to make and use the so that the increased pressure of 'theextra current occurs therein.

The mventlon .consists n a device whlch not only serves for conducting the current from the armature of the generator to the exterior c rcuits, but also as the meansfor opening and closing the respective external circuits at the required times, as will be more fully tions as required wl'rere four-cylimler-engines are employed.

Referringto l igs. 1 and 1 s is the arma-,- ture and p the pole pieces of the current" generator and a is a shp ring, assumed lobe fixed on the shaft of the armature. as for example, by a set screw 8 Fig. 1.. The two.

ends of the armature winding are led to the two segments 0 and J ofthe slip ring 'a and.

the one end is, in addition fixed to the armature bed s. The spark gap or ignite: u

is-connecte by means of a conductor t bc-. tween a brush b sliding on tho slip-ring a and the body a of thearumture. The action will'hcreadily understood fromth'e diagram. It is assumed that the slip ring a rotates in the direction of-the arrow. So long as the brush 1) is in contact with the segment 0, the armature winding is open; as soon however as it passcsover the first insulating piece between segments 0 and d into the position shown in the drawing, the armature is short circuited, and when it has advanced so as to leave the segment 0 and only to contact with the segment (.i, the armature circuit is closed through the igniting circuit. During the first period the armature rotates freely, that is without reacting u n thefield magnets (not shown in the diagram). Then, as soon as the brush reaches segment dand thus short circuits the arnmturewinding g verystrong electromotive' force is inducedandfinally, when the brush leaves the segment a, the current generated by this electromotive force is sent through the igniter u. For the sake of clearness the leads connected to the armature body are shown in dotted lines while those connected to the free end of the wind- 'ing are in full lines.

Fig. 2 shows the same arrangement with the difference that the slip ring is supposed to be stationary and the brush rotating. This does not alteranything in the above described action only the free end of-the winding is connected to the brush 7) and the body end with the segment 0 while the spark gap at is connected to the segment (I. This aitords the advantage that the shortcircuitmg of the armature is maintained as long asthebrush remains in contact with the segmcnte'and only ceases when it leaves the latter. Fig. shows the arrangement for tour cylinders. ]hc'e0nstruction likewise does not diflor from the foregoing in its essential features; only in place of .a single brush o four brushes f, Alt and i are provided which are connected respectively to the four spark gaps lumen and m,by means of leads A, 2.1..

"13,.- i All the-spark gaps are connected to a common ground lead t. By this means the -appa'r atus notonly serves for effecting the necessary short circuitings and interruptions but it also acts as a distributor.

Fig. '4 shows lhe'modificat-ions that are necessary when the slip ring is 'st'athmary and the brush revolves. The slip ring is for this purpose divided into eight segments of which every alternate one is marked r.. These segments 1" are, all connected with each other and with the armature body circuit and the intermediate segments a to g are connected by the corresponding leads t to t with the corresponding spark gaps in, to u,,, while these are connected by the common lead it with the body .9. The free end of the armature winding is connected to the brush b. The action of this arrangement will be readily understood from the foregoing description, and does not difi'er from that of Fig. 3. The described arrangement affords the advantage that for taking off the current, for short circuiting the armature and for. the distribution of the current only a single brush is required, and this brush always slides on metal with only narrow interruptions of insulating material. By this means it is possible to construct these parts in an exceedingly simple and strong manner, which is of great importance for a the reliability of the iguitions.

'ductor connected to the other side of the The moment, of ignition may be determined, to some extent, by settingup the parts so that the brush 7) will occupy a position either to the right or left of the position illustrated in Figs. 1 and 3 so that the igniter will receive current at a different 'period of the rotation of the ring. In the form shown in Figs. 2 and 4:, the same result may be accomplished by shifting the ringannularly, as will be readily understood. This shifting or adjusting of the parts may obviously be accomplished by loosening the set screw 8' (see Fig. 1), then shifting the ring circmnfercntially, and then tightening the set screw. Such an adjustment of the moment of ignition must however be so arranged that tbe moment at which the short-eircuiting period commences is not also altered; this must always take place before the occurrence of the maximum pressure; On this. accountthe arrangenmnts at Figs. 2 and 4 offer special advantages because the duration of the short cireniting period is in these cases not dependent upon the width of the brushes.

Having now particularly described and ascertained the nature of my said invention I declare that what I claim is:

1. In an electric ignition device, the combination, with an igniter, an electric generator having a rotatable armature winding provided with two terminals, and a peima nent connection between the armature winding and one side of the ignitcr, of a conigniter, a ring comprisin a plurality of contact devices separated From each other by insulation, a brush arranged to contact with the contact devices, means for producing a relative rotation between the brush and the ring, said brush and one of the contact devices being arranged to make an intermittent connection between the aforesaid conductor and one terminal of the armature 'tion, with an igniter, an electric generator having an armature winding, and a ;.permanent connection between said winding and one side of the lgnri'er, of a rmg comprising aplurality of contact devices separated by insulation ,a connection between the other side of thc igniter andone of said contact devices, a connection between one terminal of the armature winding and another contact device, and a rotatable brush connected to the other terminal of the winding and arranged to travel over and contact with the contact devices.

3. In an electric igniter, the combination, with a plurality of igniters, an electric generator having an armature winding, a permanent con11cctio rr,bet\vee1i said winding and one side of each igniter, and a ring'comprising a plurality of contact devices separated by msnlation, the alternate contact devices being connected to one terminabof the armature winding, the intermediate contact devices being separately connected to the respective remaining sides of the corresponding igniters, a brush connected to the remaining terminal of the armature \vinding, and means to produce relative rotationt between the brush and the ring, the normally stationary one of the said relatively rotative mcn'ibers being angularly adjustable.

4. In an elcctrie'igniter, the combination,

'with a'plurality of igniters, anelectric gcnerator having an armature winding, :1 permanent connection between "said winding and one side of each igniter, and a ring comprising a plurality of contact devices separated by insulation, the alternate contact devices being connectedto one terminal of the armature winding, the intermediate contact devices being separately connected to the respective remaining sides of the corresponding'igniters, a brush connected to the re- 11;} maining terminal of tbearmature winding and means to produce relative r'otationbetween the'brush and the ring, the face of the brush being of a size sutliciently greater than the width of the insulationto bridge the-latter and intermittently connect the adjacent contacts.

5.'In an electric ignitcr, the combination, with a-plurality of igniters, an electric generator having an armature winding, :1 per- 120, manent connection between said winding and one side of each igniter, and a ring com; prising a plurality of contact devices sep arated by insulation, the alternate contact devices being connected to one terminal of the armature winding, the intermediate contact devices being separately connected to the respective remaining sides of the cor t respon'ding igniters and a rotatable brush connected to the remaining terminal of the Winding; "the bang sep- Uopies of this patent may be obtained for five cents each, by addressin y bf by insnletionm e v being connected 0' witnesses.

ately connected to the respective remainlng'sidee oi the corresponding e rotatnble brush connected t0 the remaim ing't'erminal of the errnat'ure winding i niters, and J5 errangedfito travel over and make contact with the contact devices.'

In testimony whereof I affixed my signature in the Witnesses Rnnonr KLEIN, -ERNS'I ENTFNMANN.

Washington, D. C.

have hereunto 20 presence of two eorrnoe HONOLD g the Commissioner of Patents, 

